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-rw-r--r--Monitor.c292
1 files changed, 162 insertions, 130 deletions
diff --git a/Monitor.c b/Monitor.c
index 30c031a..188cb8b 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -26,7 +26,6 @@
#include "md_p.h"
#include "md_u.h"
#include <sys/wait.h>
-#include <signal.h>
#include <limits.h>
#include <syslog.h>
#ifndef NO_LIBUDEV
@@ -34,8 +33,8 @@
#endif
struct state {
- char *devname;
- char devnm[32]; /* to sync with mdstat info */
+ char devname[MD_NAME_MAX + sizeof("/dev/md/")]; /* length of "/dev/md/" + device name + terminating byte*/
+ char devnm[MD_NAME_MAX]; /* to sync with mdstat info */
unsigned int utime;
int err;
char *spare_group;
@@ -46,9 +45,9 @@ struct state {
int devstate[MAX_DISKS];
dev_t devid[MAX_DISKS];
int percent;
- char parent_devnm[32]; /* For subarray, devnm of parent.
- * For others, ""
- */
+ char parent_devnm[MD_NAME_MAX]; /* For subarray, devnm of parent.
+ * For others, ""
+ */
struct supertype *metadata;
struct state *subarray;/* for a container it is a link to first subarray
* for a subarray it is a link to next subarray
@@ -67,7 +66,7 @@ struct alert_info {
static int make_daemon(char *pidfile);
static int check_one_sharer(int scan);
static void write_autorebuild_pid(void);
-static void alert(char *event, char *dev, char *disc, struct alert_info *info);
+static void alert(const char *event, const char *dev, const char *disc, struct alert_info *info);
static int check_array(struct state *st, struct mdstat_ent *mdstat,
int test, struct alert_info *info,
int increments, char *prefer);
@@ -75,6 +74,7 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist,
int test, struct alert_info *info);
static void try_spare_migration(struct state *statelist, struct alert_info *info);
static void link_containers_with_subarrays(struct state *list);
+static void free_statelist(struct state *statelist);
#ifndef NO_LIBUDEV
static int check_udev_activity(void);
#endif
@@ -123,13 +123,12 @@ int Monitor(struct mddev_dev *devlist,
* and if we can get_disk_info and find a name
* Then we hot-remove and hot-add to the other array
*
- * If devlist is NULL, then we can monitor everything because --scan
+ * If devlist is NULL, then we can monitor everything if --scan
* was given. We get an initial list from config file and add anything
* that appears in /proc/mdstat
*/
struct state *statelist = NULL;
- struct state *st2;
int finished = 0;
struct mdstat_ent *mdstat = NULL;
char *mailfrom;
@@ -137,24 +136,32 @@ int Monitor(struct mddev_dev *devlist,
struct mddev_ident *mdlist;
int delay_for_event = c->delay;
- if (!mailaddr) {
- mailaddr = conf_get_mailaddr();
- if (mailaddr && ! c->scan)
- pr_err("Monitor using email address \"%s\" from config file\n",
- mailaddr);
+ if (devlist && c->scan) {
+ pr_err("Devices list and --scan option cannot be combined - not monitoring.\n");
+ return 1;
}
- mailfrom = conf_get_mailfrom();
- if (!alert_cmd) {
+ if (!mailaddr)
+ mailaddr = conf_get_mailaddr();
+
+ if (!alert_cmd)
alert_cmd = conf_get_program();
- if (alert_cmd && !c->scan)
- pr_err("Monitor using program \"%s\" from config file\n",
- alert_cmd);
- }
+
+ mailfrom = conf_get_mailfrom();
+
if (c->scan && !mailaddr && !alert_cmd && !dosyslog) {
pr_err("No mail address or alert command - not monitoring.\n");
return 1;
}
+
+ if (c->verbose) {
+ pr_err("Monitor is started with delay %ds\n", c->delay);
+ if (mailaddr)
+ pr_err("Monitor using email address %s\n", mailaddr);
+ if (alert_cmd)
+ pr_err("Monitor using program %s\n", alert_cmd);
+ }
+
info.alert_cmd = alert_cmd;
info.mailaddr = mailaddr;
info.mailfrom = mailfrom;
@@ -183,14 +190,12 @@ int Monitor(struct mddev_dev *devlist,
continue;
if (strcasecmp(mdlist->devname, "<ignore>") == 0)
continue;
+ if (!is_mddev(mdlist->devname))
+ continue;
+
st = xcalloc(1, sizeof *st);
- if (mdlist->devname[0] == '/')
- st->devname = xstrdup(mdlist->devname);
- else {
- st->devname = xmalloc(8+strlen(mdlist->devname)+1);
- strcpy(strcpy(st->devname, "/dev/md/"),
- mdlist->devname);
- }
+ snprintf(st->devname, MD_NAME_MAX + sizeof("/dev/md/"),
+ "/dev/md/%s", basename(mdlist->devname));
st->next = statelist;
st->devnm[0] = 0;
st->percent = RESYNC_UNKNOWN;
@@ -204,9 +209,14 @@ int Monitor(struct mddev_dev *devlist,
struct mddev_dev *dv;
for (dv = devlist; dv; dv = dv->next) {
- struct state *st = xcalloc(1, sizeof *st);
+ struct state *st;
+
+ if (!is_mddev(dv->devname))
+ continue;
+
+ st = xcalloc(1, sizeof *st);
mdlist = conf_get_ident(dv->devname);
- st->devname = xstrdup(dv->devname);
+ snprintf(st->devname, MD_NAME_MAX + sizeof("/dev/md/"), "%s", dv->devname);
st->next = statelist;
st->devnm[0] = 0;
st->percent = RESYNC_UNKNOWN;
@@ -289,17 +299,16 @@ int Monitor(struct mddev_dev *devlist,
for (stp = &statelist; (st = *stp) != NULL; ) {
if (st->from_auto && st->err > 5) {
*stp = st->next;
- free(st->devname);
- free(st->spare_group);
+ if (st->spare_group)
+ free(st->spare_group);
+
free(st);
} else
stp = &st->next;
}
}
- for (st2 = statelist; st2; st2 = statelist) {
- statelist = st2->next;
- free(st2);
- }
+
+ free_statelist(statelist);
if (pidfile)
unlink(pidfile);
@@ -403,109 +412,115 @@ static void write_autorebuild_pid()
}
}
-static void alert(char *event, char *dev, char *disc, struct alert_info *info)
+static void execute_alert_cmd(const char *event, const char *dev, const char *disc, struct alert_info *info)
+{
+ int pid = fork();
+
+ switch (pid) {
+ default:
+ waitpid(pid, NULL, 0);
+ break;
+ case -1:
+ pr_err("Cannot fork to execute alert command");
+ break;
+ case 0:
+ execl(info->alert_cmd, info->alert_cmd, event, dev, disc, NULL);
+ exit(2);
+ }
+}
+
+static void send_event_email(const char *event, const char *dev, const char *disc, struct alert_info *info)
+{
+ FILE *mp, *mdstat;
+ char hname[256];
+ char buf[BUFSIZ];
+ int n;
+
+ mp = popen(Sendmail, "w");
+ if (!mp) {
+ pr_err("Cannot open pipe stream for sendmail.\n");
+ return;
+ }
+
+ gethostname(hname, sizeof(hname));
+ signal(SIGPIPE, SIG_IGN);
+ if (info->mailfrom)
+ fprintf(mp, "From: %s\n", info->mailfrom);
+ else
+ fprintf(mp, "From: %s monitoring <root>\n", Name);
+ fprintf(mp, "To: %s\n", info->mailaddr);
+ fprintf(mp, "Subject: %s event on %s:%s\n\n", event, dev, hname);
+ fprintf(mp, "This is an automatically generated mail message. \n");
+ fprintf(mp, "A %s event had been detected on md device %s.\n\n", event, dev);
+
+ if (disc && disc[0] != ' ')
+ fprintf(mp,
+ "It could be related to component device %s.\n\n", disc);
+ if (disc && disc[0] == ' ')
+ fprintf(mp, "Extra information:%s.\n\n", disc);
+
+ mdstat = fopen("/proc/mdstat", "r");
+ if (!mdstat) {
+ pr_err("Cannot open /proc/mdstat\n");
+ pclose(mp);
+ return;
+ }
+
+ fprintf(mp, "The /proc/mdstat file currently contains the following:\n\n");
+ while ((n = fread(buf, 1, sizeof(buf), mdstat)) > 0)
+ n = fwrite(buf, 1, n, mp);
+ fclose(mdstat);
+ pclose(mp);
+}
+
+static void log_event_to_syslog(const char *event, const char *dev, const char *disc)
{
int priority;
+ /* Log at a different severity depending on the event.
+ *
+ * These are the critical events: */
+ if (strncmp(event, "Fail", 4) == 0 ||
+ strncmp(event, "Degrade", 7) == 0 ||
+ strncmp(event, "DeviceDisappeared", 17) == 0)
+ priority = LOG_CRIT;
+ /* Good to know about, but are not failures: */
+ else if (strncmp(event, "Rebuild", 7) == 0 ||
+ strncmp(event, "MoveSpare", 9) == 0 ||
+ strncmp(event, "Spares", 6) != 0)
+ priority = LOG_WARNING;
+ /* Everything else: */
+ else
+ priority = LOG_INFO;
+ if (disc && disc[0] != ' ')
+ syslog(priority,
+ "%s event detected on md device %s, component device %s", event, dev, disc);
+ else if (disc)
+ syslog(priority, "%s event detected on md device %s: %s", event, dev, disc);
+ else
+ syslog(priority, "%s event detected on md device %s", event, dev);
+}
+
+static void alert(const char *event, const char *dev, const char *disc, struct alert_info *info)
+{
if (!info->alert_cmd && !info->mailaddr && !info->dosyslog) {
time_t now = time(0);
printf("%1.15s: %s on %s %s\n", ctime(&now) + 4,
event, dev, disc?disc:"unknown device");
}
- if (info->alert_cmd) {
- int pid = fork();
- switch(pid) {
- default:
- waitpid(pid, NULL, 0);
- break;
- case -1:
- break;
- case 0:
- execl(info->alert_cmd, info->alert_cmd,
- event, dev, disc, NULL);
- exit(2);
- }
- }
+ if (info->alert_cmd)
+ execute_alert_cmd(event, dev, disc, info);
+
if (info->mailaddr && (strncmp(event, "Fail", 4) == 0 ||
strncmp(event, "Test", 4) == 0 ||
strncmp(event, "Spares", 6) == 0 ||
strncmp(event, "Degrade", 7) == 0)) {
- FILE *mp = popen(Sendmail, "w");
- if (mp) {
- FILE *mdstat;
- char hname[256];
- gethostname(hname, sizeof(hname));
- signal(SIGPIPE, SIG_IGN);
- if (info->mailfrom)
- fprintf(mp, "From: %s\n", info->mailfrom);
- else
- fprintf(mp, "From: %s monitoring <root>\n",
- Name);
- fprintf(mp, "To: %s\n", info->mailaddr);
- fprintf(mp, "Subject: %s event on %s:%s\n\n",
- event, dev, hname);
-
- fprintf(mp,
- "This is an automatically generated mail message from %s\n", Name);
- fprintf(mp, "running on %s\n\n", hname);
-
- fprintf(mp,
- "A %s event had been detected on md device %s.\n\n", event, dev);
-
- if (disc && disc[0] != ' ')
- fprintf(mp,
- "It could be related to component device %s.\n\n", disc);
- if (disc && disc[0] == ' ')
- fprintf(mp, "Extra information:%s.\n\n", disc);
-
- fprintf(mp, "Faithfully yours, etc.\n");
-
- mdstat = fopen("/proc/mdstat", "r");
- if (mdstat) {
- char buf[8192];
- int n;
- fprintf(mp,
- "\nP.S. The /proc/mdstat file currently contains the following:\n\n");
- while ((n = fread(buf, 1, sizeof(buf),
- mdstat)) > 0)
- n = fwrite(buf, 1, n, mp);
- fclose(mdstat);
- }
- pclose(mp);
- }
+ send_event_email(event, dev, disc, info);
}
- /* log the event to syslog maybe */
- if (info->dosyslog) {
- /* Log at a different severity depending on the event.
- *
- * These are the critical events: */
- if (strncmp(event, "Fail", 4) == 0 ||
- strncmp(event, "Degrade", 7) == 0 ||
- strncmp(event, "DeviceDisappeared", 17) == 0)
- priority = LOG_CRIT;
- /* Good to know about, but are not failures: */
- else if (strncmp(event, "Rebuild", 7) == 0 ||
- strncmp(event, "MoveSpare", 9) == 0 ||
- strncmp(event, "Spares", 6) != 0)
- priority = LOG_WARNING;
- /* Everything else: */
- else
- priority = LOG_INFO;
-
- if (disc && disc[0] != ' ')
- syslog(priority,
- "%s event detected on md device %s, component device %s", event, dev, disc);
- else if (disc)
- syslog(priority,
- "%s event detected on md device %s: %s",
- event, dev, disc);
- else
- syslog(priority,
- "%s event detected on md device %s",
- event, dev);
- }
+ if (info->dosyslog)
+ log_event_to_syslog(event, dev, disc);
}
static int check_array(struct state *st, struct mdstat_ent *mdstat,
@@ -540,7 +555,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
goto disappeared;
if (st->devnm[0] == 0)
- strcpy(st->devnm, fd2devnm(fd));
+ snprintf(st->devnm, MD_NAME_MAX, "%s", fd2devnm(fd));
for (mse2 = mdstat; mse2; mse2 = mse2->next)
if (strcmp(mse2->devnm, st->devnm) == 0) {
@@ -670,7 +685,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
strncmp(mse->metadata_version, "external:", 9) == 0 &&
is_subarray(mse->metadata_version+9)) {
char *sl;
- strcpy(st->parent_devnm, mse->metadata_version + 10);
+ snprintf(st->parent_devnm, MD_NAME_MAX, "%s", mse->metadata_version + 10);
sl = strchr(st->parent_devnm, '/');
if (sl)
*sl = 0;
@@ -758,14 +773,13 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist,
continue;
}
- st->devname = xstrdup(name);
+ snprintf(st->devname, MD_NAME_MAX + sizeof("/dev/md/"), "%s", name);
if ((fd = open(st->devname, O_RDONLY)) < 0 ||
md_get_array_info(fd, &array) < 0) {
/* no such array */
if (fd >= 0)
close(fd);
put_md_name(st->devname);
- free(st->devname);
if (st->metadata) {
st->metadata->ss->free_super(st->metadata);
free(st->metadata);
@@ -777,7 +791,7 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist,
st->next = *statelist;
st->err = 1;
st->from_auto = 1;
- strcpy(st->devnm, mse->devnm);
+ snprintf(st->devnm, MD_NAME_MAX, "%s", mse->devnm);
st->percent = RESYNC_UNKNOWN;
st->expected_spares = -1;
if (mse->metadata_version &&
@@ -785,8 +799,8 @@ static int add_new_arrays(struct mdstat_ent *mdstat, struct state **statelist,
"external:", 9) == 0 &&
is_subarray(mse->metadata_version+9)) {
char *sl;
- strcpy(st->parent_devnm,
- mse->metadata_version+10);
+ snprintf(st->parent_devnm, MD_NAME_MAX,
+ "%s", mse->metadata_version + 10);
sl = strchr(st->parent_devnm, '/');
*sl = 0;
} else
@@ -1051,6 +1065,24 @@ static void link_containers_with_subarrays(struct state *list)
}
}
+/**
+ * free_statelist() - Frees statelist.
+ * @statelist: statelist to free
+ */
+static void free_statelist(struct state *statelist)
+{
+ struct state *tmp = NULL;
+
+ while (statelist) {
+ if (statelist->spare_group)
+ free(statelist->spare_group);
+
+ tmp = statelist;
+ statelist = statelist->next;
+ free(tmp);
+ }
+}
+
#ifndef NO_LIBUDEV
/* function: check_udev_activity
* Description: Function waits for udev to finish
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 21:56:06 +0000